Don't know

Sometimes people want to see something deep. When something is not there. Sometimes actors become part of a willing orgy. I have heard Sophia takal of the mumble core movement say that the camera was rolling and after a while the just did what the felt like doing. If the wanted to have sex the would record it. I think he had a group of actors that had know idea what they were making and just went with the flow. After a while when you get actors in a room together for long periods of time there creativity mixes with there sexual hormones and you can't get them to do almost anything. With the artistic amunity they lose there inhibitions and just act. Weather it's direction or not. Would any actor have real sex on scream unless they were experimenting. It's acting once you get intimate with a person it becomes real. You can't act like your real penetrating some one. The all just made it up as the went along. And saw how it would come out.